Contaminant detection system
First Claim
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1. A method of detecting contaminants on a skin exposed to the environment comprising the steps of:
- transmitting a guided wave through the skin at a non-perpendicular incident angle with respect to the skin, wherein the wave travels at a substantially constant phase velocity corresponding to multiple resonances through the skin;
receiving the wave transmitted through the skin and providing a received signal indicative thereof, wherein the received signal has a frequency signature; and
extracting features from the frequency signature of said received signal for classifying contaminants on the skin.
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Abstract
A contaminant detection system includes a transmitter for transmitting a guided wave through the skin at particular resonances, wherein each resonance point utilized will have propagation characteristics sensitive to a condition of interest. A contaminant may then be classified by transmitting several resonances and then carrying out appropriate feature extraction and pattern recognition techniques utilizing a host processor.
46 Citations
19 Claims
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1. A method of detecting contaminants on a skin exposed to the environment comprising the steps of:
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transmitting a guided wave through the skin at a non-perpendicular incident angle with respect to the skin, wherein the wave travels at a substantially constant phase velocity corresponding to multiple resonances through the skin; receiving the wave transmitted through the skin and providing a received signal indicative thereof, wherein the received signal has a frequency signature; and extracting features from the frequency signature of said received signal for classifying contaminants on the skin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for detecting contaminants on a skin exposed to the environment comprising:
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a transmitter for transmitting a guided wave through the skin at a non-perpendicular incident angle with respect to the skin, such that the guided wave travels at a substantially constant phase velocity corresponding to multiple resonances through the skin; a receiver for receiving said guided wave transmitted through the skin; means for providing a received signal indicative of the received wave, wherein the received wave has a frequency signature; and a signal processor for extracting features from the frequency signature of said received signal for classifying contaminants on the skin. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification